package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.dto.SetmealDTO;
import com.sky.dto.SetmealPageQueryDTO;
import com.sky.entity.Setmeal;
import com.sky.entity.SetmealDish;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.SetmealDishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.SetmealService;
import com.sky.vo.DishItemVO;
import com.sky.vo.SetmealVO;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.ArrayList;
import java.util.List;

@Service
public class SetmealServiceImpl implements SetmealService {

    @Autowired
    private SetmealMapper setmealMapper;

    @Autowired
    private SetmealDishMapper setmealDishMapper;

    @Override
    public void save(SetmealDTO setmealDTO) {
        SetmealVO setmealVO = new SetmealVO();
        BeanUtils.copyProperties(setmealDTO,setmealVO);

        //向套餐表插入1条数据
        setmealMapper.insert(setmealVO);

//        获取insert语句生成的主键值
        Long id = setmealVO.getId();

        List<SetmealDish> setmealDishes = setmealDTO.getSetmealDishes();

        //向套餐菜品表插入多条数据

        if (setmealDishes != null && setmealDishes.size() > 0) {
            for (SetmealDish setmealDish : setmealDishes) {
                setmealDish.setSetmealId(id);
            }
        }
        setmealDishMapper.insertBatch(setmealDishes);
    }

    @Override
    public PageResult pageQuery(SetmealPageQueryDTO setmealPageQueryDTO) {
        PageHelper.startPage(setmealPageQueryDTO.getPage(),setmealPageQueryDTO.getPageSize());

        Page<SetmealVO> page = setmealMapper.pageQuery(setmealPageQueryDTO);
        return new PageResult(page.getTotal(),page.getResult());
    }

    @Override
    public void deleteById(List<Long> ids) {
        //判断当前套餐是否能够删除---是否存在起售中的菜品
         Integer count = setmealMapper.countByIdsAndStatus(ids);
         if (count > 0){
             throw new DeletionNotAllowedException(MessageConstant.SETMEAL_ON_SALE);
         }
        //删除套餐表中的菜品数据
        setmealMapper.deleteBatch(ids);

        //删除套餐关联的口味数据
        setmealDishMapper.deleteBySetmealIds(ids);
    }

    @Override
    public void startOrStop(Integer status, Long id) {
        Setmeal setmeal = new Setmeal();
        setmeal.setStatus(status);
        setmeal.setId(id);
        setmealMapper.update(setmeal);
    }

    @Override
    public SetmealVO getByIdWithcategory(Long id) {
        Setmeal setmeal = setmealMapper.getById(id);

        List<SetmealDish> setmealDishes = setmealDishMapper.getSetmealDishById(id);

        SetmealVO setmealVO = new SetmealVO();
        BeanUtils.copyProperties(setmeal,setmealVO);
        setmealVO.setSetmealDishes(setmealDishes);
        return setmealVO;
    }

    @Override
    public void updateWithsetmealDishes(SetmealDTO setmealDTO) {
        Setmeal setmeal = new Setmeal();
        BeanUtils.copyProperties(setmealDTO,setmeal);
        //修改套餐表基本信息
        setmealMapper.update(setmeal);

        //删除原有的菜品信息
        List<Long> list =  new ArrayList<>();
        list.add(setmealDTO.getId());
        setmealDishMapper.deleteBySetmealIds(list);

        //重新插入菜品信息
        List<SetmealDish> setmealDishes = setmealDTO.getSetmealDishes();
        if (setmealDishes != null && setmealDishes.size() > 0){
            setmealDishes.forEach(setmealDish -> {
                setmealDish.setId(setmealDTO.getId());
            });
            setmealDishMapper.insertBatch(setmealDishes);
        }
    }

    /**
     * 条件查询
     * @param setmeal
     * @return
     */
    public List<Setmeal> list(Setmeal setmeal) {
        List<Setmeal> list = setmealMapper.list(setmeal);
        return list;
    }

    /**
     * 根据id查询菜品选项
     * @param setmealId
     * @return
     */
    public List<DishItemVO> getDishItemById(Long setmealId) {
        return setmealMapper.getDishItemBySetmealId(setmealId);
    }
}
